If the fuel is getting past the needle & seat whether around the o ring or past the needle the level in the float bowl will be to high.... Remove the sight plug & you'll know... Is the fuel dribbling from the booster venturi or is it coming from the accelerator pump squirter nozzles.. If it's from the booster venturis you might want to check your power valve... If it's coming from the squirter nozzles the one way check valve may be hung up allowing pull over...